Answer:
If there were a new mutation to the HTT gene that causes a reduction to the CAG trinucleotide repeat, the allele frequency for Huntington's disease would decrease in South Africa. HD is caused by too many repeats of the CAG segment causing an abnormally long version of the huntintin protein which becomes deadly. so if the number of repeats is reduced then the person is more likely to not have Huntington's disease. If they do still develop Huntington's disease, it will be more likely to be adult onset and they will still have an opportunity to reproduce offspring which may carry the trait for reduced CAG.
If a new mutation in the HTT gene were to cause a reduction in the CAG trinucleotide repeat, the allele frequencies for HD in South Africa would likely decrease over time.
What is mutation?A mutation is a change in the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA's genome. Viral genomes can be made up of either DNA or RNA.
If a new mutation in the HTT gene caused a decrease in the CAG trinucleotide repeat, HD allele frequencies in South Africa would likely decrease over time. This is due to the fact that reducing the size of the CAG segment would result in a lower risk of developing HD.
Individuals with CAG repeats in the range of 27-35 do not develop HD, but they may pass on the mutated allele to their offspring, who may develop the disorder if the CAG repeat size exceeds 35.
Therefore, if a new mutation were to arise that reduces the size of the CAG repeat, individuals who carry the mutated allele would be less likely to pass it on to their offspring.
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what are three things that an ecological pyramid shows that food webs
and food chains do not show.
Answer:
An ecological pyramid shows energy flowing through different ecosystems, the amount of energy that is being passed down, and the amount of organisms.
Explanation:
The three things that are not displayed by food chain and food web but showed by ecological pyramid are;
Energy flowing through different ecosystems.
Amount of organisms.
Amount of energy that is being passed down.
An ecological pyramid can be regarded as graphical representation that display relationship between different organisms in an ecosystem.The trophic levels in this ecological pyramid contains amount of organisms as well as mass which is biomass and the amount of energy that can be found in each level.Therefore, it shows the energy flowing through different ecosystems.
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Difference between phagocytosis and lymphocytes
Answer:
The main difference between lymphocytes and phagocytes is that lymphocytes generates specific immune responses against pathogens whereas phagocytes generate the same response to any pathogen.
Explanation:
This means lymphocytes are the tools of the adaptive immunity whereas phagocytes are the tools of innate immunity
what is Reticulum? where we can find it?
Answer: Endoplasmic reticulum (ER), in biology, a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells and serves multiple functions, being important particularly in the synthesis, folding, modification, and transport of proteins .
Answer:
A reticulum is the second compartment of the stomach of ruminant mammals, lined with a membrane having honeycombed ridges. In the stomach.
Explanation:
A gene mutation changes a section of DNA whereas a Chromosome mutation changes a base.
True
or
False
Answer:
I think true as then it wouldn't make sense making it a mutatuon.
Yuki has a bowl of ice. She places the ice in a warm room and watches as it melts into liquid water. Yuki then places the liquid water over a Bunsen burner and heats it until it vaporizes. Explain what happens to the water molecules in Yuki's experiment; from the beginning to the end of the experiment.
Answer:
ice is a solid.When heat is added it turns into a liquid,its a reversible change.As regarding to the water moleculesWhen water is heated, it expands, or increases in volume. When water increases in volume, it becomes less dense. As water cools, it contracts and decreases in volume. When water decreases in volume, it becomes more dense. For samples of water that have the same mass, warmer water is less dense and colder water is more dense.Im not sure if this helps but try it out :)
What advancements helped Earth’s human population to grow so quickly?
Explanation:
human have increased the world's carrying capacity through migration agriculture Medical advances and Communications. the age structure of a population allows us to predict population growth.unchecked human population could have dire long term effects on our environment.
3. What is an embryo?
a. a small, adult organism
b. a fully developed organism
c. an early stage in the development of an organism
d. the gamete of an organism
Answer:
c. an early stage in the development of an organism
Explanation:
Answer:
c. an early stage in the development of an organism
Explanation:
In general, in organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization and continues through the formation of body structures, such as tissues and organs
what is an indicator of soil?
Which of these statements about fungi are true?
Answer: where are your statements
Explanation:
Using the research of another scientist without giving proper credit is
A. ethical
B. a liability
C. plagiarism
D. standard practice
Answer:
C. Plagiarism
Explanation:
Without quoting/crediting someone's work you are copying and taking their work for yours.
Serious consequences will follow (including jail time)
Vascular resistance is due to friction between blood and the walls of the blood vessel. Which of the following causes low vascular resistance?
O obesity
O dehydration
O high blood pressure
o cholesterol levels within normal range
The factor that does not lead to a high vascular resistance is cholesterol levels within normal range.
What is vascular resistance?The term vascular resistance refers to a situation in which blood finds it difficult to pass through the blood vessels. A lot of factors may lead to this such as the constriction of the blood vessels owing to high cholesterol levels.
From the options that we have in the question, the factor that does not lead to a high vascular resistance is cholesterol levels within normal range.
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Who came up with the theory of continental drift? Was his theory originally accepted by
the scientific community?
Answer:
scientist Alfred Wegener and no it wasn't accepted .
Explanation:
The main reason that Wegener's hypothesis was not accepted was because he suggested no mechanism for moving the continents. He thought the force of Earth's spin was sufficient to cause continents to move, but geologists knew that rocks are too strong for this to be true. Hope it helps :) , please mark as the brainliest answer .
Various factors influences the fluidity of the phospholipid bilayer of the cell membrane. If we were to chart the composition of cell
membranes in organisms as we move north from the equator to higher latitudes around the Arctic circle, we would expect to find
phospholipids with
A)
fewer hydrophilic heads.
B)
fewer interspersed cholesterol molecules.
both saturated and unsaturated fatty acid tails.
D
an increase in the length of the fatty acid tails.
Answer:
D
an increase in the length of the fatty acid tails.
Explanation:
As average annual temperatures decrease, we would expect to find phospholipids within the cell membranes of organisms to have both saturated
and unsaturated fatty acid tails. Saturated fatty acids tails are arranged linearly, in a way that maximizes interactions between the tails and
decreases bilayer fluidity. Unsaturated fatty acids, on the other hand, have more distance between the tails, fewer intermolecular interactions and
more membrane fluidity. Longer tails and decreased cholesterol also decrease fluidity
Which of the following is NOT a strategy
for controlling water pollution?
A hiding storm drains
B, sewage treatment plants
C. water treatment plants
D, maintaining coastal wetlands
Answer:
A
Explanation:
if you hide a storm drain it really doesn't do much because it doesn't clean the water, and all of the other options do clean water of contaminants.
8. For the food chain shown below, which of the following changes would 2 points
have the most severe consequences? Grasses - Crickets → Field Mice →
Hawks
A minor decrease in rainfall
The field mice population slightly increasing
The introduction of a second predator that eats field mice
0 A parasitic infestation that reduces the cricket population
Answer:
I think it is A Parasitic one
Explanation:
A decrease in rainfall may lead to drought, thereby altering the basis (first level) of the food web.
A food web is a diagram that represents the relationships between different groups of organisms in an ecosystem.Producers (e.g., plants) are organisms that maintain the entry of matter and energy to the food web.Rainfall is fundamental for maintaining the life of land producers (in this case, grasses) in the food web.In conclusion, a decrease in rainfall may lead to drought, thereby altering the basis (first level) of the food web.
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Please anyone help please help ASAP ASAP please please help
Answer:
A
Explanation:
the 1st one is the answer
A rainbow is an example of light's _____.
1) refraction
2) reflection
3) absorption
4) transmission
Answer:
2
Explanation:
Answer:
Refraction is correct.
Explanation:
are eukaryotes made of cells?
Answer:
it is a cell
Explanation:
Organisms with prokaryotic cells are called prokaryotes. All prokaryotes are single-celled (unicellular) organisms. Bacteria and Archaea are the only prokaryotes. Organisms with eukaryotic cells are called eukaryotes.
...
Prokaryotic Cells.
Prokaryotic Cells Eukaryotic Cells
Bacteria Plants, animals, fungi
What factors could speed up or slow down cellular respiration
Answer:
Explanation:
Temperature: At a very high temperature, the rate of respiration decreases with time, and at very low temperature, the respiration rate is insignificant. ...
Carbon dioxide concentration: The higher the carbon dioxide concentration, the lower the rate of respiration.
Lymph is another medium of circulation in the human body. justify
Answer:
Yes, Lymph is another medium of circulation in the human body
Explanation:
Yes, Lymph is another medium of circulation in the human body. Lymph is part of lymphatic system which in turn is part of the circulatory system. The lymphatic circulatory system comprises of lymphatic vessels which carry clear fluid "lymph" towards the heart. The flow however is unidirectional
what is the meaning of PHIVOLCS?
Answer:
Philippine Institute of Volcanology and Seismology. Please vote as the brainliest , thanks :)
Explanation:
Identify which European nations were successful in trading with Japan before the 1800’s.
BRAINIEST ANSWER
Just check my answers please
:))
Answer:
Sand, Gravel and Granite is the Answer.
Explanation:
if it helps don't forget to like and mark me
Answer:
ur correct
Explanation:
I just searched it up
You have a glass of milk and a glass of water you need to pour them into the same container such that the two liquids are differentiated and can be separated how do you do it?
Answer:
Pour the water first, freeze it, and then pour the milk. The freezing point of raw unprocessed milk is ∼−0.5 degrees Celsius, so by keeping the barrel under 0 degrees, but above −0.5 degrees, you can keep the water frozen and the milk liquid, and be able to separate them.
You can freeze the whole thing below −0.5 degrees. Just don’t warm it suddenly above 0 degrees without separating the milk first.
In fact, the freezing point of milk can be and is used as a test to check whether water was added to milk by producers.
4. Which is not a common poison?
Answer:
Do you have the options?
Which two characteristics do all forces have?
O motion and size
O size and direction
O direction and speed
O balance and direction
Answer:
direction and speed are two characteristics of forces
Does anyone know this? Please help! Due in 45 min
Answer:
I think it's A tell me if it's wrong
hope it helps
have a good day :)
Explanation:
Answer:
D. l,ll, and lll
Explanation:
Hope this helps!
What type of muscle tissue is attached to bone?
Smooth
Cardiac
Striated
Both a & b
Answer:
striated
Explanation:
skeletal muscle: The voluntary muscle of vertebrates, which is striated and anchored by tendons to bone, is used to effect skeletal movement such as locomotion.
When a wolf eats a rabbit and then uses the energy from the rabbit to
run, the wolf's body converts...
O chemical energy to electrical energy
O mechanical energy to chemical energy
O thermal energy to mechanical energy
chemical energy to mechanical energy
Answer:
thermal energy to mechanical energy
Explanation:
have a nice day good luck
At the time when a wolf eats a rabbit so here the body should convert chemical energy to mechanical energy
Conversion of energy:At the time when the wolf eats a rabbit and then uses the energy from the rabbit to run, so here the body should convert chemical energy to mechanical energy.
As the chemical energy treated as the potential energy that stored the food.
hence, the last option is correct.
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Which of the following conditions are required for natural selection?
I. overproduction of offspring
II. competition for resources
III. genetic variation
IV. natural disasters
Answer:
I think the answer is III. genetic variation